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Editorial Team
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Asked: 2026-06-16T14:56:28+00:00

I’m trying to use rtmpgw to set up a stream on a local port,

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I’m trying to use rtmpgw to set up a stream on a local port, to be accessed using a videoview or some other video player. I have the native executable set up and it’s working, however when I test it with the command 

rtmpgw --sport 8080

it returns the following error:

HTTP-RTMP Stream Gateway v2.4
(c) 2010 Andrej Stepanchuk, Howard Chu; license: GPL

ERROR: startStreaming, TCP bind failed for port number: 8080
ERROR: Failed to start HTTP server, exiting!

This happens on any port I’ve tried. Without the --sport argument it tries port 80 and fails. From my understanding, non-privileged/non-root users can’t bind ports lower than 1024 in unix. Since this is a virtual machine is it different? Wouldn’t the native executable / static binary be executed outside the virtual machine?

Code: 

File rtmp = new File(getFilesDir() + "/rtmpgw");
ProcessBuilder pb = new ProcessBuilder("./" + rtmp.getName(), "--sport", "8080");
pb.directory(getFilesDir());
Process stream = pb.start();
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1 Answer

  1. Editorial Team

    Thanks for the responses. It turns out being above port 1024 isn’t the only requirement. It needs to fall in the ephemeral port range. To get the ephemeral port range, I executed the command

    root@android:/ # cat /proc/sys/net/ipv4/ip_local_port_range
cat /proc/sys/net/ipv4/ip_local_port_range
32768   61000

    I’m not certain how consistent that range is across all android devices, but my native executable successfully starts when given a port within the ephemeral range.

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